Added HTTP response related macros `AWAIT_ASSERT_RESPONSE_*`.
Added HTTP response related macros `AWAIT_ASSERT_RESPONSE_*`.

This RR is the item (3) for MESOS-4112. It adds HTTP respose
related macros that were not defined before:
1. `AWAIT_ASSERT_RESPONSE_STATUS_EQ_FOR`
2. `AWAIT_ASSERT_RESPONSE_STATUS_EQ`
3. `AWAIT_ASSERT_RESPONSE_BODY_EQ_FOR`
4. `AWAIT_ASSERT_RESPONSE_BODY_EQ`
5. `AWAIT_ASSERT_RESPONSE_HEADER_EQ_FOR`
6. `AWAIT_ASSERT_RESPONSE_HEADER_EQ`

NOTE: The above are the counterpart of `AWAIT_EXPECT_RESPONSE_*`

Review: https://reviews.apache.org/r/45357/

yuquanshan/customizedMesos,craimbert/mesos,asamerh4/mesos,reneploetz/mesos,neilconway/mesos,craimbert/mesos,gsantovena/mesos,jpeach/mesos,yuquanshan/customizedMesos,kaysoky/mesos,reneploetz/mesos,abudnik/mesos,abudnik/mesos,Gilbert88/mesos,jpeach/mesos,asamerh4/mesos,jpeach/mesos,chhsia0/mesos,verizonlabs/mesos,gsantovena/mesos,andschwa/mesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,Gilbert88/mesos,Gilbert88/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,dforsyth/mesos,Aman-Jain-14/customizedMesos,dforsyth/mesos,asamerh4/mesos,abudnik/mesos,yuquanshan/customizedMesos,abudnik/mesos,kaysoky/mesos,kaysoky/mesos,zmalik/mesos,neilconway/mesos,dforsyth/mesos,jpeach/mesos,kaysoky/mesos,zmalik/mesos,verizonlabs/mesos,Gilbert88/mesos,neilconway/mesos,Gilbert88/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,craimbert/mesos,kaysoky/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,Aman-Jain-14/customizedMesos,andschwa/mesos,neilconway/mesos,yuquanshan/customizedMesos,reneploetz/mesos,zmalik/mesos,jpeach/mesos,kaysoky/mesos,andschwa/mesos,craimbert/mesos,dforsyth/mesos,jpeach/mesos,verizonlabs/mesos,zmalik/mesos,verizonlabs/mesos,chhsia0/mesos,asamerh4/mesos,chhsia0/mesos,chhsia0/mesos,andschwa/mesos,asamerh4/mesos,chhsia0/mesos,dforsyth/mesos,craimbert/mesos,andschwa/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,kaysoky/mesos,neilconway/mesos,dforsyth/mesos,craimbert/mesos,Gilbert88/mesos,neilconway/mesos,abudnik/mesos,gsantovena/mesos,jpeach/mesos,chhsia0/mesos,yuquanshan/customizedMesos,zmalik/mesos,yuquanshan/customizedMesos,andschwa/mesos,gsantovena/mesos,gsantovena/mesos,zmalik/mesos,verizonlabs/mesos,dforsyth/mesos,gsantovena/mesos,gsantovena/mesos,chhsia0/mesos,abudnik/mesos,reneploetz/mesos,craimbert/mesos,zmalik/mesos,abudnik/mesos,Gilbert88/mesos,andschwa/mesos,verizonlabs/mesos,Aman-Jain-14/customizedMesos,asamerh4/mesos